When checking a fuse on a 24-volt power supply with a voltmeter, if the fuse is blown, __________ volts will be read across the fuse.
A) 0
B) 24
C) 48
D) 115

Question

Quizplus · Accepted Answer

When a fuse is blown, it creates an open circuit, preventing current from flowing through it. Measuring across the fuse with a voltmeter in this condition will show the full voltage of the power supply, which in this case is 24 volts, because the voltage drop across the open circuit (blown fuse) is equal to the supply voltage.

When Checking a Fuse on a 24-Volt Power Supply with a Voltmeter